Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A Droop Control Method for Energy Storage System Used in DC Distribution Network

A technology of DC distribution network and control method, applied in the direction of DC network circuit devices, electrical components, circuit devices, etc., can solve the problems of the system not working normally, affecting the accuracy of power distribution, and increasing the difficulty of control.

Active Publication Date: 2019-12-31
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI +1
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has a better current sharing effect, but due to the existence of interconnection wires, the control difficulty is increased. When the main module in the parallel system fails, the entire system cannot work normally and the reliability is low.
The voltage droop control strategy makes each power supply have its own independent droop relationship curve by setting the droop coefficient, so that the system has good redundancy and scalability, but when the line impedance is too large to be ignored, it will affect the power distribution. accuracy

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A Droop Control Method for Energy Storage System Used in DC Distribution Network
  • A Droop Control Method for Energy Storage System Used in DC Distribution Network
  • A Droop Control Method for Energy Storage System Used in DC Distribution Network

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0030] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0031] Such as figure 1 As shown, the energy storage system droop control method for DC distribution network of the present invention includes two parts: steady-state droop control and transient inertia control, specifically:

[0032] The rated voltage of the DC distribution network V REF and the actual voltage value of the DC distribution network V 1 Subtract the grid voltage deviation value △V, and multiply the grid voltage deviation value △V by the given steady-state droop coefficient K 1 , to obtain the steady-state reference current deviation value △I of the energy storage bidirectional converter 0REF1 . Judging the grid voltage deviation value △V, when △V>0, given the transient reference current deviation coefficient K 3 =1, when △V3 =-1. Given transient inertia coefficient K 2 Multiply by the absolute value of the grid voltage dev...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses an energy storage system droop control method used for a direct-current power distribution network. The energy storage system droop control method comprises steady state droop control and transient state inertia control, and comprises the following steps: calculating steady state reference current deviation value delta I0REF1 of steady state droop control, transient state reference current deviation value delta I0REF2 of transient state inertia control, reference current deviation value delta I0REF and actual current reference value I*0REF; subtracting actual current value I0 from the actual current reference value I*0REF to obtain current deviation delta I0, and generating an adjusting signal delta I'0 through a PI control strategy; and carrying out PWM modulation on the adjusting signal delta I'0 to generate a driving signal so as to drive an energy storage bidirectional transducer.

Description

technical field [0001] The invention relates to a droop control method for an energy storage system, in particular to a droop control method for an energy storage system used in a direct current distribution network. Background technique [0002] In recent years, with the rapid development of new energy and power electronics technology, distributed power sources and DC power loads have increased sharply. Traditional AC distribution networks are facing distributed energy access, load diversification, load scheduling and power flow balance coordination and control. a series of issues, etc. Compared with the AC distribution network, the DC distribution network has more superior performance in terms of increasing the power transmission capacity, increasing the controllability of the system, and improving the quality of power supply. The connection of the DC distribution network to the energy storage system can significantly reduce the impact of new energy on the power grid and ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H02J1/00
CPCH02J1/00
Inventor 师长立唐西胜张国伟李宁宁高超
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com